558 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
The chief characters of these subfamilies, as well as of the different 
genera, are given iu the following analysis : 
ANALYSIS OF THE GENERA OF CENTRARCIIIDiE. 
a. Dorsal fin scarcely larger than anal. (Centrarchinas.) 
b. Dorsal spines, 11 or 12; anal spines, 7 or 8; spinous dorsal longer than soft 
dorsal ; body short and deep, compressed.. C entrarcii us, 1. 
bb. Dorsal spines, 5 to 8 ; anal spines, 6; spinous dorsal shorter than soft dorsal; 
body elongate, compressed Pomoxis, 2. 
aa. Dorsal fin much larger than anal. 
c. Body rather short and deep ; dorsal fin not deeply divided. (Lepominas.) 
d. Tongue and pterygoids with teeth. 
e. Scales ctenoid ; caudal emarginate. 
/. Anal spines, 5 to 8 ; operculum emarginate behind. 
g. Lingual teeth in two patches ; gill-rakers about 20 ; most of the 
membrane bones of head serrate ; lower point of opercle 
striate, striae ending in sharp points Arciioplites, 3. 
gg. Lingual teeth in a single patch; gill-rakers about 10; only the 
preopercle serrate at its angle, bones of head otherwise 
entire ; lower point of opercle without pointed striae. 
Ambloplites, 4. 
jf. Anal spines, 3 ; operculum ending in a black convex flap ; preopercle 
entire; dorsal spines, 10 Ch^enobryttus, 5. 
ee. Scales cycloid ; caudal convex ; anal spines, 5 Acantharchus, 6. 
dd. Tongue and pterygoids toothless ; mouth small; preopercle entire. 
Ji. Operculum emarginate ; caudal fin convex. 
i. Dorsal fin continuous Enneacanthus, 7. 
ii. Dorsal fin angulated. ...Mesogonistius, 8. 
lih. Operculum more or less prolonged behind into a convex flap; 
caudal fin emarginate Lepomis, 9. 
cc. Body elongate; dorsal fin low, deeply emarginate. (Micropterenle.) 
Micropterus, 10. 
j. Mouth large ; maxillary with a supplemental bone ; opercle 
emarginate behind ; preopercle entire ; lower pharyngeala 
narrow, with sharp teeth ; caudal lunate, 
I. CENTRARCHUS. 
1829. Centrarchus Cuvier & Valenciennes, Hist. Nat. Poiss., in, 62 ( irideus ). 
1864. Eucentrarchus Grill, Amer. Jour. Sci. and Arts, 92 {irideus). 
Type : Labrus irideus Lacepede. 
Etymology : KivTpov, spine ; anus. 
ANALYSIS OF THE SPECIES OF CENTRARCHUS. 
a. Body ovate, strongly compressed ; head small ; snout short, shorter than eye ; 
mouth small, oblique ; maxillary reaching posterior border of pupil; eye large, 
3£ to 4 in head ; opercular spot narrow, much higher than long ; scales large, 4 
to 6 rows on cheeks ; dorsal high, longest spine If iu head; pectorals and ven- 
trals long, reaching anal, ventral spines extending past anus to fin. Green, with 
series of dark brown spots on sides, below lateral line farming interrupted lougi- 
tudinallines; a dark spot below eye ; soft dorsal and anal reticulated; young with 
a black ocellus at base of soft dorsal. Head, 2f to 3 ; depth, 1| to 2. D. xi-xii,12; 
A.vii-viii, 15 ; iat. 1., 38 to 44 ; L. 6 inches Macropterus, 1. 
